Copy creates a deep copy of an image (copies underlying buffer).

Dump dumps an image to a file.

DumpGIF dumps a GIF image to a file.

DumpJPEG dumps a JPEG to a file with a given quality.

Load tries to load an image from a file.

NewYuv420 creates a new image.Image from a raw Yuv420p buffer.

RandGray creates a random grayscale image with a given seed.

RandRGBA creates a random RGBA image with a given seed.

Sub tries to call SubImage on the given image.

ToGray returns a new copy of img, converted to grayscale, with the origin of its bounds reset to 0.

ToRGBA returns a new copy of img, converted to RGBA, with the origin of its bounds reset to 0.

YCbCr is a raw YCbCr image.